<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    var w = window.screen.width;
    if(w>1200){
        window.location = './pc/index.html'
    }else{
        window.location = './mobile/index.html'
    }
</script>
</body>
</html>